Working at the Houston cardiology center he founded, Dr. Cooley, in 1969, implanted the first totally artificial heart. His mentor and partner, the renowned surgeon Dr. Michael E. DeBakey, felt betrayed.

Working at the Houston cardiology center he founded, Dr. Cooley, in 1969, implanted the first totally artificial heart. His mentor and partner, the renowned surgeon Dr. Michael E. DeBakey, felt betrayed.